Electric cell



P. P. POLITOWSKI.

ELECTRIC CELL. APPLlcMlon mio mi. H. |920.

1,402,956. Patented Jan. 10, 1922.

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P. P. POLITUWSKI. ELECTRIC CELL.

APPLICATION FILED FEB. l4. 1,920. 1,402,956. Patented Jan. 10, 1922.

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PETER PAUL POLITOWSKI, F CHICAGC, ILLINOIS.

ELEcTmc CELL.

Application filed February 14, 1920.

To all wlw/m it may concer/rt:

Be it kno'wn that I, PETER PAUL PoLIToW- SKI, a citizen of the United States, residingr at Chicago, in the county of Cook and State of Illinois, have, invented certain new 'and useful Improvements in Electric Cells, of which the following is a specification.

The invention relates to electric cells, primarily adapted to be ap lied to storage cells for electric batteries. he object of the in- .vention is to produce a compact cell which can be used alone, or, if desired, in batte ies, and whichl is arranged 'for portabilit so that it may be conveniently and safely carried from place to place, in automobiles or other vehicles. or otherwise, without injury to the cell itself. or to anything-that may be in the neighborhood of the cell. A further object of the invention is to-produce an ex- `ceedingly efficient cell for various purposes,

one that will have, when properly'charged, a very high electromotive force` and for its size a large amper-age, and one in which the leakage between the grids is less than with ordinary types of cells. l

O." the accompanying' drawings Fig. 1 is a plan view of a cell` which embodies features ot my invention; Fig. 2 is an elevation of the same; Fig. 3 is a plan viewof the cell with the cover removed; Fig. .4 is an elevation of one of the plates of the cell; Fig. 5 is an en# larged sectional viewof the cover clamping means: Fig. G is an enlarged central sectional view ot the cover of the cell; Fig. 7 is an enlarged central sectional view of means for se )aratinfr the ilates; und* Fi". 8 is an enis l i Af l') larged detail vicw'ot a portion of one of the plates of the cell.

rFhe ccll comprises a cy'liiidrical metal casing 10, the entire inner 'surfaceof which is coated with a suitable insulation enamel composition 1l. The casing is closed by means of a cover l2 madeof any suitable material as glass. The cover Fits snugly over the casing` and is held thereon by any suitable means l prefer for this purposcthe spring clips` lli which are fixed tothe casing and cxtciul upwardly and over V,the cover 12. ln the projecting arni 14 of thc clip is threaded a thumb screw 15. .A flange 1G extends around the periphery of the cover and by means of the. thumb screws the cover may be held firmly in place. A gasket 1T is provided between thc cover andthe casing, so as to prieccut leakage of the electrolyte, and to Specification of Letters Patent.

Patented J an. 10, 1922.

serial No. 358,644. l

act as a buffer between the glass and the metal casing. By this means it will be Seen that, by unserewing the thumb screws a sufticient distance one of the clips 13 may be sprung outwardly and the cover may be remove( and may be as quickly replaced when desired, and it may be held so snugly in place that there is no danger of leakage of the acid, and no rattling of the parts. A handle 19 is provided which is fixed to the cover1 and an ordinary vent cap 18 is pro` vided to allow more conveniently passing liquids into the cell and also to allow the,

gas within to escape.

The interior of the cell comprises grids .2O and 21. These grids are cylindrical and are placed concentric with the4 casing. and the grids 20 alternate with the grids 21, the grids 20 being positive and the grids 21 being negative. As many grids may be used as is desired. In the illustration four only are shown in order to avoid confusion. But it is evident that more grids may be used, and that the number of grids would depend more or less upon the size ofthe cell.

. ln order to hold the grids in position, and also to increase the insulation between the plates and the casing1 I provide a circular insulation plate 22 adapted to fit on the bottom of' the casingtthe )late having annular fianges 23 concentric with the casing. which are adapted to hold the lower ends of the c vlindrical grids in their propel' positions; it being understood that the distance between the flanges and the number of flanges would be adapted to the desired distance between the grids and the number of grids. ln order to maintain the proper position ofthe upper ends of the cylindrical grids. l provide annular flanges 24 on the under surface of the cover, these flanges also assisting materially in strengthening the cover so that it may be safely used as a support for the handle 19.

Each of the grids is provided with a terminal Q5, fixed to the upper en d of the grid and arranged to pass through a slot 29 suitably positioned in the cover 12. For convenience the terminals of the positive grids are positioned on one side of the handle of the cover and the terminals of the negative grids are positioned on the other side of the cover. Each of the terminals has a slot 26 in its upper end and a bolt 27 is adapted to be placed in all of the slots of one set of terminals. with an insulation tube or thim ,32nfto the bolt, the bo ble 28 encircling the bolt between each pair of terminals. And a lock nut 30 and a lmurled nut 33 hold the bolt firmly in place. A knurled nut 31 is used in a well known manner for connecting the external circuit wire 32 to the bolt, and thus to the terminals. By this arrangement it will be seen that, by merely loosening the knurled nut 33, and Without disturbing the nuts l30 and 31, whichv .clam the connecting wire it may be slipped from the slots of the terminals, and the cover of casing may then be conveniently removed. It will thus be seen that I have provided means 4for ve quickly removing the cover or putting it 1n place Without intel.`- fering materiall with the external circuit of the cell; it being understood that the externa] circuit may lead to other cells or to any suitable apparatus either for charging or dischar ing the battery.

The gri s 20 and 2l may be formed oi' any suitable material and of any suitable form of grid surface. I prefer to have the grids consist of openings 35 througli tlie rids, the horizontal length of the openings eing somewhat greater than the vertical Width, `and the openings being positioned any suitable distance apart` The grids nia i be of any suitable thickness and material, prefer for the purpose grids composed of au alloy of lead and about vfive or ten per cent of zinc. Any suitable substance may be used for filling the openings 3G. I prefer bichromate of potash for the positive grids and lithar e for the negative grids, and for 4the electro yte a solution of sulpliuric acid ot about thirty per cent.

I have discovered that by the use of the grids substantial y as described and the chemicals specitied,ior other suitable chemicalls, that the leakage from one grid to the other is materially reduced as compared with the ordinary'type of flat grids, and

i' that the rate of charging maybe materially increased. a higher voltage beingr allowable for that purpose, and that the amperage for the weight of the cell is greater than is comV mOn.

I claim as my invention:

1. An electric cell comprising a cylindrical casing, a pluralit, of cylindrical grids in said casing, said ginds being substantially concentric and equally spaced, and means for connecting the alternate 'grids together.

2. An electric cell comprising a plurality of cylindrical grids of unlike diameters positioned in a casing concentric with each other, bi-chromate of potash mounted in one set of grids, and litliarge mounted in the other set of grids, the grids of one set alternating with the grids of the other, a solution of sulphuric acid in said casing, and means for connecting together the bi-chromate of potash grids and other means for connecting together the litharge grids.

3. An electric cell comprising a plurality of grids, each of said grids having a terminal projecting upwardly, said grids being mounted in a closed casing, said casing having openings through which the said terminals pass freely.

4. In an elect-ric cell a casing', a plurality of grids in said casing, an insulation member iu the bottom of said casing, said memlier haring flanges projecting u Wardl f to hold the lower ends of said gri s in p ace,

and a cover for said casing, said cover having flanges projecting inwardly to hold the upper ends of said grids in place.

5. ln an electriccell w casing having a cover, grids in said casing, terminals fixed to said grids and extending through said cover, slots in the external ends of said terininals, and a member positioned in said slots and fixed to said terminals.

(l. In an electric cell a casing.having a cover, grids invsaid casing, terminals fixed to said grids and extendlng through said cover. slots in the external ends of said terminals, and a. member positioned in said slots and fixed to said terminals, said niembcr comprising a bolt, a nut on each end of said bolt, and a thimblc between each two terminals.

In testimony whereof I hereunto set my hand.

PETER PAUL POLITOVVSKI. 

